N-Desmethyl Diphenhydramine Hydrochloride (CAS 53499-40-4)

N-Desmethyl Diphenhydramine Hydrochloride is a primary amine derivative of Diphenhydramine, characterized by the absence of a methyl group from the nitrogen atom in the ethylamine side chain. This modification impacts its affinity and selectivity for biological targets, particularly histamine receptors. In the realm of research, this compound is of significant interest for its role in elucidating the pharmacodynamics of antihistamines and their metabolites. The hydrochloride salt form enhances its solubility in aqueous solutions, facilitating its application in various experimental setups, including in vitro assays and structure-activity relationship studies. By serving as a comparator or a metabolite of Diphenhydramine, N-Desmethyl Diphenhydramine Hydrochloride aids in understanding the metabolic pathways and the modulation of receptor activity by Diphenhydramine and its derivatives. This, in turn, contributes to a broader comprehension of histamine-mediated physiological responses and the mechanisms underlying histamine receptor antagonism.